Improvement in vault-covers



W. LYNCH.

Vault-Covers;

Patented June 16, 1874.

I nventor 7 Vit messes gmm 4024 UNITED STATES WILLIAM LYNCH, or sAIv FRANCISCO, CALIFORNIA:

PATnnlLQEEIcE.

lMPROVEMENT IN VAULT-COVERS.

Specification forming part of Letters Patent No. 152,135, dated June 16, 1874; application filed April 27, 1874.

To all whom 'itmay concern:

Be it known that I, WILLIAM LYNCH, of

San Francisco city and county, State of Oalifornia, have invented an Improved Dead- Light; and I do hereby declare the following description and accompanying drawings are sufficient to enable any person skilled in the art or science to which it most nearly appertains, to make and use my said invention or improvement without further invention or experiment.

My invention relates to improvements in the dead-lights such as are used for lighting cellars, basements, and other dark places, by an overhead light.

The object of my invention is to provide a ventilating block or blank for dead-lights, which can beinserted and secured in the openings of the skeleton dead-light frame in the same manner that the glass light itself is inserted and secured, and having in its center an opening for ventilation. These I use in the same frame or casting, and in combination with alternate glass lights, so as to ventilate and light a cellar by the same device.

In order to more fully illustrate and explain my invention, reference is had to the accompanyin g drawings forming a part of this specification, in which- Figure l is a perspective'view, showing the manner of securing my dead-lights. Fig. 2 is a sectional elevation.

A is the metal frame or casting, having as many holes as it is desired to provide deadlights or ventilating-blocks. B B are the glass dead-lights, which are inserted in the openings in the frame. These glass blocks are in the form of a short truncated cone. In order to ventilate the cellar, basement, or

of the cup with the hole in it above the levelof the frame A, and approximately level with the upper surfaces of the glass light 13. The hole 6 serves to ventilate the basement, cellar, or other place, and thus avoid the musty disagreeable smell which is encountered in dark and underground places, which this class of light is intended to illuminate.

As many of these ventilating-blocks can be inserted in a dead-light frame as may be desired, and their position can be adjusted to suit, as they will fit in either of the holes in the frame A. These ventilating-blocks are secured in place with cement, or by other convenient means, in the same manner that the glass lights are secured.

By this means I provide a convenient and reliableventilating dead-light.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, Is

The dead-light frame A, in combination with the alternate glass lights B, and perforated ventilating-disks D, as and for the purpose set forth.

In witness whereof I hereunto set myhand and seal.

WM. LYNCH. [L. s.] Witnesses:

GEo. H. STRONG, JNo. L. BOONE. 

